名词
中文翻译：高线
同义词：
['border', 'boundary', 'demarcation line']
例句：
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1. Thehigh line is a crucial part of themilitary defense system.
高线是军事防御系统的重要组成部分。
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2. The construction workers were working onthe high line to reinforce it.
建筑工人正在高线上工作，加固它。
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3. Thehigh line was set up to prevent trespassers from crossing into the restrictedarea.
高线被设置起来，以防止闯入者越过限制区域。